dc
45d6c025c9
The multi-load page rendered the loading stage only inside a branch guarded by
`parsedDatasets.length`, and that collection is empty for the whole read and
sheet-scan phase - so two of the four stage labels ("Reading the file",
"Searching for the data in the file") were assigned but never reached the DOM,
and a large file sat on screen with no feedback at all.
The stage is now shown next to the file name and size from the moment a file is
attached, and again in the content area while the sheets are being parsed. The
labels cover every phase the user waits through: reading the file, searching
for the data in the file, file ready to load, fetching the dataset details (one
getdata call per dataset - the longest wait), extracting the data, and
extracting the data finished. A spinner accompanies the stages that have work
running; the idle stages and the finished state show the label alone.
Two corrections fall out of that: the stage only moves to `extracted` once
every sheet has been parsed rather than when the first one finishes, and the
read's continuation only advances the stage if the read is still the phase in
progress (the sheet scan runs in parallel and can finish first).
excel-multi-load.cy.ts gains test 4, which asserts the file size, the ready
stage, the fetching stage (the getdata calls are held open so it is on screen
long enough to assert) and the handover to the "select a dataset" hint.
Closes #121